Car-bolster.



PATENTED JAN. 3, 1905.

A. B. BELLOWS.

OAR BOLSTER.

APPLIOATION FILED MAY 2, 1902.

2 SHEETS-SHEET 1.

WITH E8855 5 0 9 1 3 N A TU D E T N E T A P A. B. BELLOWS.

GAR BOLSTER.

APPLICATION FILED MAY 2, 1902.

2 SHBETS-SHEET 2.

WITNESSES mvnn-on Patented January 3, 1905.

PATENT OFFICE.

ARTHUR B. BELLOVVS, OF PITTSBURG, PENNSYLVANIA.

CAR-BOLSTER.

SPECIFICATION forming part of Letters Patent No. 779,389, dated January3, 1905.

Application filed May 2, 1902. Serial No. 105,635.

To aZZ whom, it may concern.-

Be it known that I, ARTHUR B. BELLows, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulCar-Bolster, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification, in which- Figure 1 is a partial transversesection on the lineII of Fig. 2 looking toward the left. Fig. 2 is anend elevation showing one form of my improved bolster in position, theside portions of the truck being broken away. Fig. 3 is a partial topplan View, and Fig. 4: is an end perspective view, of the bolster ofFigs. 1 and 2. Fig. 5 is a partial side elevation, and Fig. 6 an endelevation, showing another form of bolster. Figs. 7 and 8 are viewssimilar to Figs. 5 and 6, showing another form of the invention; andFigs. 9 and 10 are similar views showinga similar form, the fish-bellytransom being inverted.

My invention relates to bolsters for railway trucks and cars, and isdesigned to provide a strong, light, and simple construction which canbe easily and cheaply made from rolled Z-bars or pressed-up sections oftransverse U shape. 7

In the drawings, referring to the form of Figs. 1 to 4, inclusive, Ishow the bolster as formed of two Z-bars 2 2, arranged parallel to eachother, with their upper flanges 3 projecting inwardly. The outer lowerflanges 4 of each Z-bar are notched near their ends, as

shown at 5, and vertical angles 6 are riveted t0 the web in line withthe notched portions to form guides.

In Figs. 1 and 2, 7 indicates the inverted archbar, 8 the spring-plankchannel-iron, and 9 the coiled springs of the bolster. These springsbear at their upper ends upon the spring-bearing seat 10, which issecured between the webs of the Z-bars and fits against their upperflanges. I have shown the seat as havinglower depending flanges 11, andthe securing-rivets which extend through the webs and the seat alsopreferably extend through the guidingangles 6.

The bolster guide-bars 12 extend,

vertically between the pairs of angles 6 on the outer sides of theZ-bars. parts of the Z-bars are secured together by top plate 13, and Ipreferably use a lower reinforcing-plate 1 1 for the central part of thebolster. 15 represents the center plate.

In Figs. 5 and 6 I show a bolster of modified form wherein instead ofusing two Z-bars I form the body of a pressed or bent plate of invertedtrough form, having lower outwardly-projecting flanges I. In this form,as in the previous one, these flanges are notched at 5', while the sideportions 2 are provided with vertical guide-angles 6. The springbearingseat 10 is the same as before, as are also the upper and lower middleplates 13 and 14: and the center plate 15. In this form I preferablyreinforce the central portion of the bolster by means of pressed shapes16, having flanges extending around them and riveted to the top andsides of the trough. These fillers are preferably spaced an equaldistance from the center of the bolster on each side.

In Figs. 7 and 8 I show a form similar to that of Figs. 1 to 1,inclusive, except that the body of the bolster is of fish-belly form,being shallowerat its end than at the center. In this case I preferablyreinforce the shallow end portions by lower plates 17, riveted to theflanges 4, and forming a part 'of the spring-bearing seat. In this casethe Z-bars are preferably pressed up from steel sheets in order toobtain the fish-belly form. Fillers 18 are provided between the endportions and above the plates 17.

In Figs. 9 and 10 I show a form similar to that of Figs. 7 and 8, exceptthat the fishbelly is inverted, the parts otherwise being the same asbefore.

The advantages of my invention result from the use of the body formedeither of two Z-bar members or of an inverted trough, since a light andstrong construction is thus afforded, and also from the fish-bellyform,which makes the construction lighter, while retaining strength anddistributing the metal according to the strains. I

The construction may be used as a body- The intermediate bolster andmany changes may be made in the form of the bolster and other partswithout departing from my invention.

I claim 1. A truck-bolster having a body with in wardly-projectingportions at the top, and lower outwardly-projecting flanges, said sidesbeing free from other flanges, the lower outer flanges being cut awaynear the ends; substantially as described.

2. A bolster havinga body with inwardlyprojecting portions at the topand lower outwardly-projecting flanges, said sides being free from otherflanges, the lower outer flanges being cut away near the ends, andguides above the out-away flanged portions and consisting of anglesriveted in pairs; substantially as described.

3. A truck-bolster of fish-belly form having outwardly-projecting lowerflanges and being free from outwardly-projecting upper flanges, andlower reinforcing members secured to the outer ends of the bolster;substantially as described. 4. A truck-bolster of fish-belly form havinglower outwardly-projecting flanges cut ARTHUR B. BELLOVVS Witnesses:

GEO. B. BLEMING, H. M. CoRwIN.

